Hhahaha you put way too much effort in describing your examples and putting them in a nice presentation, that's why looks like an ad, hahaha.
To look less like an advertisement you can explain better why you find these interesting and spend less time with the examples.
Today it updated and it started happening to me too, not only I can't seek, the mute and pause buttons don't work either. It's like once in full screen the whole interface can't be touched.
While on the feed: I can unmute.
On full screen: the controls related to the video don't work, the others (close, up/down vote, open comments, etc) work fine.